PLEASE HEL

Kay knows the the first step for writing 0.48/6.4 in decimal form is to change the denominator to a whole number. Explain how she can do so without changing the value of the fraction. Then use long division to find the decimal value.

Trent wants to buy 2 packs of trading cards for 3 dollars each. the trading card packs that trent normally buys tend to come in packs of 6, 10, 12, or 15 cards. after selecting 2 packs, trent found that the first pack of cards cost 25 cents per card, and the second pack cost 30 cents per card. trent uses this information to write the equations below in order to compare c, the number of cards in each pack.